Quote:
Originally Posted by funola
Hmmm, heating the the sleeve with a mig welder would expand it, not shrink it. You sure this works? Have you tried it? 
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Just as the other Member said. When the weld solidifies it shrinks and pulls in the parent Metal.
You see a similar instruction on some large Engines as a way to remove Valve Seats inserts by running a welding bead on the Valve Seat Face. When the Metal solidifies the OD of the Valve Seat Insert shrinks and loosens it.